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'Restart' Marc-Mentat

'Restart' Marc-Mentat

'Restart' Marc-Mentat

(OP)
Hello,

I simulate a static test of an composite adhesive joint implementing a progressive damage scenario. I want to apply a simulation of one incremental step per simulation, so as to be able
to update the material properties of each element in every simulation according to the outcome of the failure analysis.
I use Marc as solver and the main body of the simulation is written in a python enviroment.
in order to succeed that, i use the 'restart last' command however it doesnt work propoerly
I will give you an overview of the program and my requirements hoping that you can understand the problem.

1. i have an initial dat file (first.dat) which includes model geometry, material proporties and BC. I run it using the following command:
os.system(runmarcpath + '/run_marc -j first')
The first.dat includes the Restart Last command to write the output in .t08 file. As i have one increment per simulation, the t08 should contain only info about this unique loadstep.
2. I have the second dat file (second.dat) which includes the same model geometry and BC but updated material proporties. I run it using the following command:
os.system(runmarcpath + '/run_marc -j second -r first')
The second.dat includes also the Restart command to read the t08 from the previous simulation and to write the second.t-8 file for the next simulation.
Although everything functions (no errors), the second loadstep of the second simulation gives the same results (stresses and strains).
My impression is that instead of continuing solving from the previous step (first.t08) it restarts from zero.
Just to clarify, that the linear elastic option is disabled which could introduce such an error.

Does anybody have experience on that?

Thank you in advance,

Dimi

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